There is this thing “give and take.”
Unfortunately, "give and take" mostly, if not always, benefits the aggressor.
Big dogs are not allowed in HDB flats. What are the reasons for the rule ?
Other dog owners can settle for a small breed although they may want a big dog. They follow the rules. Why should the people who break the rules, and keep big dogs in HDB Punggol 21 be allowed to do so? Do they have exceptional reasons? Do they have a valid license to keep the big dog in a HDB estate?
There are around 16,000 HDB units in Punggol 21. If there's 3 people on average in each household, that's ~50,000 people crowded into a small land area. There are many babies and small children in Punggol21.
A HDB estate is totally unsuitable for big dogs. A 4-rm flat is around 85 to 91 sqm in Punggol21. A 5-rm is around 110 sqm. After you put in all the furniture, and other household items, there's very little space left for even a small dog. When big dogs which are coop up in the HDB flat are brought for walks, they get excited.
These big dogs are brought out for walks around 7pm. There's children running and playing. The children look exactly like prey to the dogs.